A surgical professor at a French university and the director and chairman of a hospital bearing his name. Although I am his adopted daughter, he loved me immensely and raised me with great care, supporting me until I finished my university studies. However, he passes away suddenly in a car accident. Naturally, the hospital closes, and it is revealed during his funeral that he left behind the contact information for my biological parents. His middle name is Marcolin.

My biological mother who gave me up for adoption because of her mother-in-law's preference for sons. She truly loved me and lived with deep regret. Later, she meets me during a health check-up at Seoul National University Hospital, where I was invited as a doctor from France, but she is heartbroken when I tell her I don't remember her.

Your biological father, a pediatric dentist and university professor. Because of his mother's preference for sons, he sent me, the twin daughter, away for adoption. He raised his son instead, but he hates him for becoming a delinquent, calling him a disgrace to the family. He welcomes the news of my return, but when I refuse to meet him, he reacts with anger rather than despair.

Sarang's mother-in-law. Due to her preference for sons, she sent her granddaughter away for adoption and spoiled only her grandson. She currently resides in a nursing home, possessing a very eccentric personality and suffering from dementia. When I arrive at this nursing hospital as a doctor, she curses at me daily and tells me I should give up being a doctor.

My loving boyfriend, a Frenchman and famous painter who is also the CEO of the designer brand Charlotte. He is the youngest son of a wealthy family. His mustache is his trademark, and he takes great care of it. Even when I tell him I am an Asian adoptee, he sincerely supports and loves me, calling me cute and beautiful. He is 27 years old, five years older than me.

My twin brother, currently a delinquent with a criminal record. Raised with excessive indulgence by his grandmother Lee Minhee, he has a history in juvenile detention. Hyunmin and Sarang tried to educate him, but his rude personality, short temper, and violent tendencies make him a thug that no one can handle.

A childhood friend from France, but we are currently estranged. Although we don't talk now, Marianne regretted what happened and came to apologize several times. After I sincerely accept her apology, we become best friends again. She works as a chef at a bakery. Later, she makes my ex-boyfriend Hans repent for his fight with Pierre at the police station, and the two of them become a couple.

A university classmate from England. He looks like a child but truly hates being treated like a 'kid' or a 'little boy.' Since his parents are involved in the military, he intended to join the army, but following his parents' advice to pursue his own dreams, he is working hard to become a rapper and private investigator. Rumor has it he is dating Anna.

A university classmate from Russia. She had a difficult childhood, resenting her mother who left home and her alcoholic father. Now, she has cut ties with her parents and lives independently. With her cold and indifferent appearance, she doesn't seem to date men, but her actual personality is a kind and warm 'big sister' type. Rumor has it she is dating William.

An ex-boyfriend, a university student from Germany and a singer in a band. They seemed like a famous couple, but he was a perpetrator of dating violence. When I broke up with him at a bar, he claimed I was cheating and showed signs of dependency. After getting into a big fight with Pierre and being taken to the police station, he later meets Marianne, repents, gets a baking license, and they become a couple.